MCQEasy1 mark
Select the correct option for each of the following questions.
If A = [[5, 10], [3, -4]] and I = [[1, 0], [0, 1]], then AI is equal to
Topic: Matrices
Previous-year question practice database
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Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(c) AI = A = [[5, 10], [3, −4]].
Explanation
Multiplying any matrix by the identity matrix leaves it unchanged.
In words
AI = A = [[5, 10], [3, −4]].